Temperatursensor

7.1 NTC Temperatursensoren

7.1 NTC

T [°C] Ua [V] UT [V] Fehler [%]

5

0.713

0.465

0.88

10

0.842

0.967

0.83

15

0.976

1.487

0.33

20

1.112

2.018

0.45

25

1.250

2.540

1.00

30

1.381

3.058

1.45

35

1.507

3.560

1.50

Gleichung zur Berechnung der Widerstandes

mit

R(T) Widerstand bei der Temperatur T-273,15
Rs Widerstand bei T = 298,15 K
T Temperatur in Kelvin
Ts Bezugstemperatur = 298,15 K
B B-Wert nach Datenblatt (2000 .. 12000)

Die untere Tabelle zeigt die normalisierten Werte

Temperatur Sensor - NTC Typ 703
Tempearatur T

B25/100=3920K

 Tempearatur T

B25/100=3920K
°C RT/R25 aT(%/K) °C RT/R25 aT(%/K)
-60.0
-55.0
-50.0
-45.0
-40.0

-35.0
-30.0
-25.0
-20.0
-15.0

-10.0
-5.00
.0
5.0
10.0

15.0
20.0
25.0
30.0
35.0

40.0
45.0
50.0
55.0
60.0

 -
97.762
61.922
44.168
31.833

23.173
17.030
12.621
9.4515
7.1273

5.4270
4.1522
3.2063
2.5019
1.9679

1.5623
1.2488
1.0000
0.81105
0.65930

0.53922
0.44345
0.36674
0.30513
0.25514

 -
7.1
6.9
6.7
6.5

6.3
6.1
5.9
5.8
5.6

5.5
5.3
5.1
4.9
4.7

4.6
4.5
4.3
4.2
4.1

4.0
3.9
3.7
3.6
3.5

 65.0
70.0
75.0
80.0
85.0

90.0
95.0
100.0
105.0
110.0

115.0
120.0
125.0
130.0
135.0

140.0
145.0
150.0
155.0
160.0

165.0
170.0
175.0
180.0
.

 0.21457
0.18131
0.15360
0.13064
0.11155

0.095606
0.082347
0.071180
0.061779
0.053799

0.146970
0.041132
0.036141
0.031847
0.028153

0.024955
0.022158
0.019722
0.017607
0.015756

0.014132
0.012703
0.011444
0.010331
.

 3.4
3.4
3.3
3.2
3.1

3.0
3.0
2.9
2.8
2.8

2.7
2.6
2.6
2.5
2.4

2.4
2.4
2.3
2.2
2.2

2.2
2.1
2.1
2.1
.

Hier noch die Umkehrfunktion

Berechnung des B-Wertes

Der B-Wert wird bestimmt durch eine Messung bei der Temperatur von 25°C und 100°C durch folgende Gleichung bestimmt:

7.1.1 Sensor Typ 703

 B57703

Climatic category (IEC 68-1)
Max. power at 35°C
Resistance tolerance
Rated temperature
B value tolerance
Dissipation factor (in air)
Thermal cooling time constant (in air)
Heat capacity		 55/125/21
150
+/- 2%
25
+/- 1%
approx. 2,6
approx. 28
approx. 73
mW

°C

mW/K
s
mJ/K

R25
Ohm

B25/100
K
5k
10k
30k		 3988
3988
3964

7.1.2 Sensor Typ K164

 B57164

Climatic category (IEC 68-1)
Max. power at 35°C
Resistance tolerance
Rated temperature
B value tolerance
Dissipation factor (in air)
Thermal cooling time constant (in air)
Heat capacity		 55/125/21
450
+/- 5%, +/- 10%
25
+/- 3%
approx. 7,5
approx. 20
approx. 150
mW

°C

mW/K
s
mJ/K

R25
Ohm

B25/100
K

R25
Ohm

B25/100
K

R25
Ohm

B25/100
K
15
22
33
47
68
100
150
220
330		 2900
2900
2900
3000
3050
3200
3200
3200
3450		 470
1k
1,5k
2,2k
3,3k
4,7k
6,8k
10k
15k		 3450
3730
3900
3900
3950
3950
4200
4300
4250		 22k
33k
47k
68k
100k
150k
220k
330k
470k		 4300
4300
4450
4600
4600
4600
4830
5000
5000

7.1.3 Sensor Typ K45

 B57045

Climatic category (IEC 68-1)
Max. power at 35°C
Resistance tolerance
Rated temperature
B value tolerance
Dissipation factor (in air)
Thermal cooling time constant (in air)
Thermal cooling time constant (on chassis)		 55/125/56
450
+/- 10%
25
+/- 3%
approx. 9
approx. 75
approx. 15
mW

°C

mW/K
s
s

R25
Ohm

B25/100
K
1k
2,2k
4,7k
6,8k
10k
33k
47k
68k
100k
150k		 3730
3900
3950
4200
4300
4300
4450
4600
4600
4600